This is my preferred route down to the south of France by car.
I touch on french CritAir regulations, Green zones app, ZPA zones and also what to expect when driving the route napoleon.
Any questions please leave a comment.
PS. If you're thinking of doing this trip or similar you'll need this! https://www.amazon.co.uk/gp/product/B07RKYRZR7/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=barnaby0d-21&creative=6738&linkCode=as2&creativeASIN=B07RKYRZR7&linkId=c171afc670c782a5f8f3b2be48dae8b4